Turret attachment for lathes.



F. P. MILLER.

TURRET ATTACHMENT FOR LATHES.

APPLICATION FILED FEB. 9, i916.

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Flc a F. P. MILLER.

TURRET ATTACHMENT FOR LATHES.

APPLICATION FILED FEB. 9, 1910.

l 1 96,575 Patented Aug. 29, 1916.

2 SHEETSSHEET 2 WIT ESSES BNVENTOR Mz WVQ Hw /2* flM/Z/W ATTORNEYS FRANK P. MILLER, 01? MEADVILLE, PENNSYLVANIA.

TURRET ATTACHMENT FOR LATHES.

Specification of Letters Patent.

Patented Aug. 29, 1916.

Application filed February 9, 1916. Serial No. 77,137.

To all whom it may concern:

Be it known that I, FRANK P. MILLER, a citizen of the United States, and a resident of Meadville, in the county of Crawford and State of Pennsylvania, have invented a new and Improved Turret Attachment for Lathes, of which the following is a full, clear, and exact description.

An object of the invention is to provide a new and improved turret attachmentfor lathes arranged to carry a number of differently shaped cutting tools, any one of which can be quickly moved into cutting position relatively to the work to be turned at the time.

Another object is to provide a simple, inexpensive and compact tool holder and one which can be readily tilted to regulate the height of the cutting edge of the tool relatively to the lathe centers.

In order to accomplish the desired result, use is made of an attaching means for removably clamping the turret attachment to the tool rest, a head mounted to turn on the said attaching means and provided with a number of tool holding devices extending in different directions and in planes at angles to the axis of the head, and manually controlled clamping means for clamping the head in position after being adjusted, with one of the tools in cutting posi' tion relatively to the work.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a sectional side elevation of the turret attachment as applied, the section being on the line 11 of Fig. 3; Fig. 2 is a reduced end elevation of the same as applied; Fig. 3 is a plan view of the turret attachment with part in section on the line 3-3 of Fig. 1; and Fig. 4 is a side elevation of the same with one of the tool holders in section on the line 4-4E of Fig. 3.

The turret attachment is arranged for removable attachment to a compound tool rest 10 of usual construction and having a T-shaped slot 11 in which is mounted to slide a clamping plate 12 provided on its under side with a spherical recess 13 engaged by a correspondingly shaped head 14 of a post 15 to provide a ball and socket joint connection between the clamping plate 12 and the post 15. The upper end of the post 15 is threaded and on this end screws a nut 16. The post 15 extends looselythrough a central aperture 17 in a clamping plate 18 resting on top of the tool rest 10 and extending across the top of the slot 11. The upper surface of this clamping plate 18 is made convex, on which fits the concave un der side 20 of a base 21 formed on a sleeve 22 through which extends the post 15, on which latter the sleeve is mounted to turn. On the top of the sleeve is adapted to abut the nut 16 so that when the latter is screwed up the clamping plates 12 and 18 firmly engage the tool rest 10 to hold the parts in position on the tool rest. When the nut 16 is loosened then the post 15 can be swung into an inclined position and with itthe sleeve 22 to tilt the latter in the desired directlon.

The upper end of the sleeve 22 is provided with an external right-hand screw thread 23, on which screws the thread 24 of a nut 25 provided with a handle 26 under the control of the operator. The nut 25 is provided with a downward tubular extension 27 adapted to rest on the top of a turret head 30 seated on the top of the base 21. The turret head 30 is provided with a number of tool holders 31, preferably four in number, to accommodate tools 32, 33, 34 and 35 for differently shaped cutting edges, as plainly indicated in the drawings. The tool holders 31 are arranged to hold the tools in planes at angles to the axis of the head 30 which latter can be readily turned to move any one of the tools 32, 33, 31 or 35 in cutting position relatively to the work 36 held on the usual face chuck 37 of the lathe or other means, as indicated in Fig. 2.

The lower end of the turret head 30 is provided with a flange 38 fitting onto the peripheral edge of the base 21 of the sleeve 22. The turret head 30 is thus mounted to turn on the base 21 of the sleeve 22, and between the sleeve 22 and the head 30 is interposed a bushing 10 provided at its upper end with a left-hand screw thread 4:1 screwing onto an interior screw thread 42 on the flange 27 of the nut 25. The bushing 40 is provided with a pin 43 extending into a groove 44 formed lengthwise on the sleeve 22 to hold the bushing 40 against turning. Thus when the nut 25 is unscrewed from the upper end of the sleeve 22 then a quick upward sliding movement is given to the bushing 40 and when the nut 25 is screwed up then a downward sliding movement is given to the said bushing 10.

The bushing 10 is provided with an ex ternal annular groove 45 into which projects a pin 46 forming part of a bolt 47 mounted to slide vertically in a suitable bearing 48 formed in the head 30. The bolt 47 is pressed in a downward direction by a spring 419, as plainly shown in Fig. 1. The lower end ,50 of the bolt 47 is adapted to engage one of a series of keepers 51 arranged in the base 21 of the sleeve 22, the keepers corresponding in number to the number of tool holders 31 on the head 30. When the several parts are in working position the bolt 47 engages one of the keepers 51 thus locking the head 30 and the sleeve together. When it is desired to turn the head 30 then the operator unscrews the nut 25 whereby the bushing 40 is lifted and with it the bolt 47 to disengage the same from the corresponding keeper 51. The head is now loose and free to turn on the base 21 of the sleeve to move the desired tool 32, 33, 3 1 or 35 into operative position relatively to the work 36. When this has been done the nut 25 is screwed up whereby the bushing 10 is moved downward and the bolt 47 is pressed by its spring 49 in engagement with the corresponding keeper 51. \Vhen it is desired to tilt the turret head 30 the nut 16 is loosened to allow of swinging the post 15 into an inclined position and with it the sleeve 22 and the turret head 30, the concave under surface 20 of the base 21 sliding on the convex top 19 of the clamping plate 18. When the desired tilted position is reached the nut 16 is screwed up to securely'fasten the sleeve 22 in place on the plate 18, and to hold the clamping plates 12 and 18 in firm position on the tool rest. When it is desired to remove the turret attachment from the tool rest 10 it is only necessary to loosen the nut 16 whereby the clamping plates 12 and 18 are loosened to permit of slipping the same off the rest 10.

The turret attachment shown and described is very simple, inexpensive and compact, and can be readily attached to the usual tool rest or removed therefrom whenever it is desired to do so.

It will also be noticed that by the arrangement described the turret head 30 carrying the tools can be readily tilted to any desired positionwith a view to regulate the height of the cutting edge of a tool relatively to the lathe centers.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A turret attachment for a lathe, comprising an attaching means for removably clamping the attachment to a tool rest, a

. head mounted to turn on the said attaching means and provided with a number of tool holding devices extending in diil'erent directions and in planes at angles to the axis of the head, manually controlled clamping means for clamping the head in position after being adjusted with one of the tools in cutting position relatively to the work, a member mounted to move up and down and controlled by the clamping means, a locking means carried by the head, and an operative connection between the said movable member and the said locking means, the locking means being controlled by the said movable member for locking the head in the adjusted position on the said attaching means.

2. A turret attachment for a lathe, comprising a head provided with a number of tool holding means extending in dilli'erent directions in planes at an angle to the axis of the head, a bushing on which the said head is mounted to turn, a sleeve on which the bushing is mounted to slide up and down, the sleeve having a clamping base on which rests the said head, a central post extending through the sleeve, a handled nut screwing on the said sleeve and against the top of the said head to clamp the latter in place, an operative connection between the said nut and bushing, and a locking device controlled by the bushing for locking the head and a sleeve together.

3. A turret attachment for a lathe, comprising a head provided with a number of tool holding means extending in different directions in planes at an angle to the axis of the head, a bushing on which the said head is mounted to turn, a sleeve on which the bushing is mounted to slide up and down, the sleeve having a clamping base on which rests the said head, the under side of the clamping base being concave, a clamping plate having its upper face fitting the concave under side of the said base, a second clamp-plate being adapted to engage a tool rest, a post having a ball and socket joint connection with the said second clamping plate and extending centrally through the said first named clamping plate, a nut screwing on the upper end of the said post and against the said sleeve to clamp the base thereof to the said first-named clamping plate and to clamp the said clamping plates to the tool rest, and a locking device controlled by the said bushing for locking the head to the sleeve base.

4. A turret attachment for a lathe, comprising a head provided with a number of tool holding means extending in different directions in planes at an angle to the axis of the head, a bushing on which the said head is mounted to turn, a sleeve on which the bushing is mounted to slide up and down, the sleeve having a clamping base on which rests the said head, a central post extending through the sleeve, a handled nut screwing on the said sleeve and against the top of the said head to clamp the latter in place an operative connection between the nut and the bushing to move the latter when the nut is turned, and a locking device controlled by the said bushing to lock the said head to the said sleeve base.

5. A turret attachment for a lathe, comprising a sleeve having a base, means for adjustably and removably attaching the said sleeve to a tool rest, a bushing mounted to slide up and down on the said sleeve, a head mounted to turn on the said bushing, and a handled nut screwing on the said sleeve and against the top of the said head, the said nut having a screw connection with the said bushing to lower the latter on screwing up the nut and to raise the bushing on unscrewing the nut, and a locking device controlled by the said bushing and adapted to engage the said sleeve base to lock the head and sleeve together.

6. A turret attachment for a lathe, comprising a sleeve having a base, means for adjustably and removably attaching the said sleeve to a tool rest, a bushing mounted to slide up and down on the said sleeve,'a head mounted to turn on the said bushing and a handled nut screwing on the said sleeve and against the top of the said head, the said nut having a screw connection with the said bushing to lower the latter on screwing up the nut and to raise the bushing on unscrewing the nut, the threads of the said screw connection running in the opposite direction to the threads between the nut and sleeve, a spring-pressed locking bolt slidable in the head, a connection between the said bolt and bushing, and a series of keepers in the sleeve base and adapted to be engaged by the said locking bolt.

7. A turret attachment for a lathe, comprising a sleeve having a base, means for adjustably and removably attaching the said sleeve to a tool rest, a bushing mounted to slide up and down on the said sleeve, a head mounted to turn on the said bushing and a handled nut screwing on the said sleeve and against the top of the said head, the said nut having a screw connection with the said bushing to lower the latter on screwing up the nut and to raise the bushing on unscrewing the nut, the threads of the said screw connection screwing in the opposite direction to the threads between the nut and sleeve, a spring-pressed locking bolt slidable in the head, the said sleeve having a lengthwise extending groove and the said bushing having a pin engaging the said sleeve groove, the said bushing having an annular groove and the said locking bolt having a pin engaging the said bushing groove, and a series of spaced keepers in the sleeve base and adapted to be engaged by the said locking bolt.

8. A turret attachment for a lathe, comprising a sleeve having a base, means for adjustably and removably attaching the sleeve to a tool rest, a bushing mounted to slide up and down on the said sleeve, means for preventing the bushing from turning on the sleeve, a head mounted to turn on the said,

bushing, a handled nut screwing on the sleeve, and adapted to bear against the said head, the said nut having an operative connection with the said bushing to move the same up and down, a spring pressed bolt for locking the head and sleeve base together, and means for controlling the said bolt from the bushing.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANK P. MILLER.

Witnesses:

BYRD C. BUTLER, MAUDE HARPER.

Copies of this patent may be obtained for five cents eacli, by addressing the Commissioner of Patents,

Washington, I). G. 

